If 10 people are divided into 2 equal groups(each group has 5 people) whats the probability that two friends A and B are in the same group?
[Math] Probability of two friends being in the same group
probability
probability
If 10 people are divided into 2 equal groups(each group has 5 people) whats the probability that two friends A and B are in the same group?
Best Answer
Hint: A is definitely in A's group. How many others are in A's group?